US20030192269A1 - Pass through firestop device - Google Patents
Pass through firestop device Download PDFInfo
- Publication number
- US20030192269A1 US20030192269A1 US10/122,859 US12285902A US2003192269A1 US 20030192269 A1 US20030192269 A1 US 20030192269A1 US 12285902 A US12285902 A US 12285902A US 2003192269 A1 US2003192269 A1 US 2003192269A1
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- Prior art keywords
- firestop
- housing
- base portion
- riser
- open end
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
- F16L5/02—Sealing
- F16L5/04—Sealing to form a firebreak device
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G15/00—Forms or shutterings for making openings, cavities, slits, or channels
- E04G15/06—Forms or shutterings for making openings, cavities, slits, or channels for cavities or channels in walls of floors, e.g. for making chimneys
- E04G15/061—Non-reusable forms
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0406—Details thereof
- H02G3/0412—Heat or fire protective means
Definitions
- the present invention relates generally to firestop devices and, more particularly, to a cast-in-place firestop device for passing cables, pipes, and the like through a concrete partition, such as a floor.
- Through-penetrations in poured concrete partitions may be formed by various techniques including knocking holes in the partition after it has been formed, or using a device which is arranged on a concrete form before the concrete is poured.
- Such devices may include an intumescent firestop material which expands and closes the opening in the partition in the event of a fire, thereby preventing the spread of fire and smoke from one compartment of the building to another.
- Such devices are often referred to as cast-in-place pass through firestop devices.
- Cast-in-place firestop devices for providing a through-penetration in a partition that use intumescent material to close the passageway and prevent the spread of fire and smoke in the event of a fire are known in the patented art.
- the Harbeke U.S. Pat. No. 4,669,759 discloses a firestop stack coupling including intumescent material which expands to close off a pipe passing through the coupling in the event of a fire.
- the Harbeke U.S. Pat. No. 4,888,925 discloses a fire retardant fluid coupling assembly having a metallic band wrapped about an intumescent collar.
- the Roth U.S. Pat. No. 5,347,767 discloses a smoke and fire protection device for providing a heat sealable raceway for running wires and cables through a concrete wall, ceiling, or floor.
- the device includes a thermally expansive material which, in the event of a fire, expands causing the raceway to collapse, thus preventing fire and/or smoke from passing through the wall, ceiling, or floor.
- the raceway slidably fits within a tubular housing allowing the raceway to extend through the sleeve to either side of the device, thereby allowing an installer to couple additional sections of the raceway at a convenient location remote from the device.
- the sleeve has a length sized to accommodate the thickness of the particular mounting location. Since the sleeve is sized to accommodate a particular partition thickness, the user must pre-select the appropriate size sleeve for a particular job, thereby requiring installers to keep a large number of different size devices on hand.
- the Rejecki U.S. Pat. No. 5,390,465 discloses a pass through firestop device for installation in a building wall or floor to provide a pass through opening for pipes, tubing, and the like.
- the device includes an axially open first end and a tubular body having a second end closed by a transverse wall. A ring of intumescent material fills the axially open first end.
- the device is installed during the formation of the building partitions by attaching the device to form elements and then pouring the floor or wall structure. After the floor is poured, the upper end section of the tubular body is removed by cutting it flush with the upper surface of the floor.
- the Münzenberger et al. U.S. Pat. No. 6,161,873 discloses a masonry lead-in fixture having a housing including an axially extending through bore, a radially protruding attachment flange provided at least at one end of the housing, an intumescent material which, in case of fire, closes the bore, and a disc-shaped partition located in the housing which extends over the inner diameter of the bore which is broken when pipe, cable, or the like is pushed through the fixture.
- the fixture includes a lengthening pipe formed of a plastic material that is cut-off to a desired length.
- the present invention provides a firestop device for providing a passage through a partition in a structure comprising a housing and firestop material arranged within the housing, wherein the housing includes at least one frangible connection transecting the housing.
- firestop material refers generally to intumescent, endothermic, and ablative materials useful in resisting the spread of fire and smoke from one compartment of a structure to another.
- the frangible connection can be formed in the housing by providing a line of weakness in the housing by, for example, scoring, notching, or creasing the housing, or by molding or machining the housing to have a thin region in the wall, thereby allowing a user to easily tear the housing along the line of weakness.
- the frangible connection defines a removable band that can be readily removed by a user, typically with the aid of a hand tool such as pliers, to shorten the length of the housing to accommodate the thickness of the partition into which the device is installed.
- the removable band preferably includes a pull tab that provides grasping means for a user to remove the band from the housing along the frangible connection, thereby facilitating manual removal of the band.
- the housing includes a base portion and a riser portion, the base portion including a recess adapted to receive the firestop material, and the riser portion including the frangible connection.
- the base portion includes a sidewall portion and a shoulder portion that combine to define the recess. The sidewall portion extends from a first open end toward the riser portion, and the shoulder portion extends inwardly from the sidewall portion to the riser portion.
- the sidewall and the shoulder portions include inner surfaces having ribs.
- the sidewall ribs serve to maintain the firestop material in the recess in spaced relation to the sidewall, thereby creating a gap between the firestop material and the sidewall that allows heated air from a fire to more completely surround the firestop material, thereby providing earlier, more uniform, and more complete expansion of the firestop material.
- a gasket is provided between the firestop material and the shoulder portion to provide a seal that prevents water and smoke from passing through the opening prior to expansion of the firestop material.
- the shoulder portion rib helps retain the gasket in place.
- the housing has first and second opposed open ends and a hollow chamber having a longitudinal axis extending from the first open end to the second open end.
- the first open end is provided in the base portion and the second open end is provided in the riser portion.
- the firestop material is provided along the sidewall portion inner surface from the first open end to the shoulder portion.
- the housing has a two-tiered cylindrical shape with the base portion having a larger diameter than the riser portion.
- the base portion may also include a radially outwardly extending flange extending outwardly from the periphery of the base portion adjacent the first open end for fixing the device to a form.
- the flange extends outwardly 360 degrees around the base portion, and in another embodiment, two separate flanges extending radially outwardly from opposite sides of the base portion are provided to allow for closer stacking of adjacent devices.
- the riser portion preferably includes a plurality of equally sized transverse bands each including a manually engageable pull tab to facilitate manual removal of the associated bands with or without the aid of a manually operated hand tool.
- a user can adjust the length of the device (i.e. shorten) in accordance with the thickness of the partition into which the device is installed. It will be recognized that providing more bands will increase the range of partition thicknesses that can be accommodated by the device, and increasing the number of bands per unit length will increase the ability of the device to more closely match the thickness of the partition.
- the pull tabs on each band may be provided with indicia indicating the length of the device at the band and corresponding to the thickness of the partition.
- Each band may also include one or more radially outwardly extending circumferential ribs that provide the bands and, consequently, the riser with added hoop strength, and also provide a projection for making snap connections.
- the device includes a cap that is attached to the riser portion of the device to cover the second open end.
- the cap includes cantilevers that snap onto the circumferential ribs, thereby securely attaching the cap to the riser portion.
- the firestop device may also include an extension member adapted to connect with the riser portion to increase the length of the device and allow the device to be used with partitions having thicknesses greater than the standard length of the device.
- the outer diameter of the extension is preferably sized so that standard size plastic pipe can fit over and connect with the extension to provide additional extension for the device.
- the device in another aspect of the invention, includes a retaining ring arranged within the base portion first open end adjacent the firestop material that serves to retain the firestop material in the base portion.
- the retaining ring may be coded with color or other indicia to indicate the quantity of firestop material provided in the device which, in turn, corresponds with the application of the device.
- An adapter may also be provided that connects with the base portion to allow the device to be coupled to a contoured surface such as a fluted or corrugated deck.
- the present invention provides a firestop device for providing a passage through a partition in a structure comprising a housing having first and second opposed open ends and a hollow chamber having a longitudinal axis extending from the first open end to the second open end, the housing including a cylindrical base portion having a diameter and a cylindrical riser portion having a diameter smaller than the base diameter, the base portion including an annular sidewall portion extending from the first open end toward the riser portion and a shoulder portion extending radially inwardly from the sidewall portion to the riser portion, the sidewall portion and the shoulder portion defining an annular recess for receiving firestop material, the sidewall and the shoulder portions including inner surfaces having inwardly extending ribs, the riser portion including a plurality of longitudinally arranged frangibly connected circumferential bands having equal axial lengths, each band including a radially outwardly extending pull tab that can be used to remove an associated band from the riser portion along a frangible connection, thereby to
- a flame retardant char forming material is provided within the housing adjacent the firestop material, preferably adjacent the inner surface of the firestop material.
- the flame retardant char forming material is an annular band arranged concentrically within the firestop material. The flame retardant char forming material serves to strengthen the expanded intumescent material such that the resulting mass forms a fire barrier that can pass the hose stream portion of ASTM E 814 Fire Test Standard.
- FIG. 1 is a perspective view of a firestop device according to the invention
- FIG. 2 is a bottom view of the housing
- FIG. 3 a is a sectional view taken along line 3 a - 3 a in FIG. 2;
- FIG. 3 b is a sectional view taken along line 3 b - 3 b in FIG. 2 showing the device with firestop material arranged therein;
- FIG. 4 is a detailed sectional view taken along line 4 - 4 of FIG. 1;
- FIG. 5 is an exploded perspective view of the device showing a cap, an extension member, and an adapter
- FIG. 6 is a sectional view showing the device installed in a concrete floor.
- FIG. 7 is a sectional view of an alternate embodiment of the invention showing a pipe passing through the device.
- FIGS. 1 - 6 show a cast-in-place pass through firestop device 2 for providing a through-penetration in a floor, wall, ceiling, or the like.
- the term through-penetration generally refers to an opening in a floor, wall, ceiling, or the like, which allows cables, wires, pipes, or other items to pass from one compartment of a structure to another.
- the device is secured to a wooden concrete form 46 (FIG. 6) or other surface such as a fluted deck using an adapter 40 (FIG. 5), and concrete is poured into the form, thereby embedding the device 2 in the concrete 44 .
- the device 2 includes a generally cylindrical hollow housing 4 having an open first end 6 , an open second end 8 , a chamber 10 extending longitudinally from the first end 6 to the second open end 8 , and intumescent firestop material 26 (FIGS. 3 b , 6 and 7 ) arranged in the device 2 adjacent the first open end 6 .
- the housing 4 may have a shape other than cylindrical.
- the housing 4 may have a square or rectangular cross section.
- the housing 4 includes a base portion 4 a having a longitudinally extending annular side wall 14 extending from the open first end 6 toward the open second end 8 , radially outwardly extending flange portions 15 extending outwardly in opposite directions from the base portion 4 a adjacent the open second end 8 , a radially inwardly extending shoulder portion 17 extending inwardly from the sidewall 14 , and a riser portion 4 b having a longitudinally extending annular side wall 16 extending from the shoulder portion 17 to the second open end 8 .
- the base portion 4 a has a larger diameter than the riser portion 4 b giving the housing 4 a two-tiered tapered configuration in which the base portion 4 a has a greater cross-sectional area than the riser portion 4 b.
- the riser portion 4 b includes a plurality of circumferential bands 18 a - d connected by frangible connections 20 a - d .
- the frangible connections 20 a - d allow one or more bands 18 a - d of the riser 4 b to be quickly, easily, accurately, and cleanly removed by a user, typically with the aid of a manually operated hand tool such as pliers, at pre-selected intervals so the device 2 can be used in partitions having a variety of thicknesses.
- Each band 18 forms a continuous 360 degree loop which forms a section of the riser portion 4 b that can be readily removed by a user to shorten the riser portion 4 b and thereby match the thickness of the partition into which the device is installed.
- Each band 18 includes a pair of circumferential ribs 18 a′ (FIG. 4) that provide hoop strength and provide means for forming a snap connection with the riser portion 4 b .
- the frangible connections 20 a - d are lines of weakness formed by, for example, molding or machining the riser to have thin areas of material connecting adjacent bands 18 a - d that can be manually broken by a user to separate adjacent bands.
- Each band 18 a - d includes a pull tab 22 a - d extending radially outwardly from the bands 18 a - d .
- the pull tabs 22 a - d facilitate removal of the associated bands 18 a - d by providing grasping means for a user to grasp and pull, typically with the aid of a hand tool such as pliers, thereby tearing the associated frangible connection to remove the band from the riser 4 b .
- Each pull tab 22 a - d may be marked with indicia indicating the length or height of the device at that pull tab corresponding to the thickness of the partition.
- the base portion 4 a contains an annular recess 24 for receiving firestop material 26 (FIGS. 3 b , 5 , 6 and 7 ).
- the firestop material 26 is provided in the form of an annular ring as shown in FIG. 5 that extends along the inner surface of the sidewall portion 14 from the first open end 6 to the shoulder portion 17 .
- the firestop material 26 may be held in place in the recess 24 with adhesive, using mechanical fasteners, or by using a retaining ring 38 (FIG. 5) described more fully below.
- the inner surface of the firestop material 26 if preferably aligned with the inner surface of the riser portion 4 b , that is, the inner diameter of the firestop material 26 and the riser 4 b are the same, whereby the diameter of the chamber 10 is generally the same along the entire length of the device 2 .
- the recess 24 is defined by the sidewall portion 14 and the shoulder portion 17 of the base portion 4 a .
- the inner surfaces of the sidewall portion 14 and the shoulder portion 17 facing the chamber 10 include rib portions 14 a and 17 a , respectively.
- the sidewall ribs 14 a extend radially inwardly from the sidewall 14 and extend longitudinally from adjacent the flange 15 to the shoulder portion 17 .
- the shoulder portion rib 17 a is an annular projection extending outwardly from the shoulder portion 17 in the direction of the first opening 6 .
- the side wall portion ribs 14 a maintain the firestop material 26 in spaced relation from the sidewall portion 14 and create an air gap 27 between the firestop material 26 and the side wall portion 14 which, in the event of a fire, allows the entire axial length of the firestop material to be exposed to heated air, thereby aiding rapid, complete, and uniform expansion of the firestop material which in turn closes the through-penetration.
- the device 2 is provided with a cap 28 that attaches to the riser portion 4 b and covers the second open end 8 .
- the cap 28 prevents concrete being poured during the formation of a partition from entering the device 2 .
- the cap 28 includes snap connectors 30 that allow the cap to be manually snap fit onto the riser portion 4 b via the circumferential ribs 18 a′.
- the device 2 may also be provided with an extension member 32 that attaches to the top of the riser portion 4 b adjacent the open second end 8 .
- the extension member 32 contains cut-outs 34 aligned with tabs 22 a - d on the riser portion 4 b that allow the extension member 32 to be placed in overlapping relation with the riser portion 4 b .
- the extension member 32 also includes snap connections 36 that allow the extension to be attached to the riser portion 4 b .
- the extension member 32 serves to increase the height of the device 2 and thereby allows the device 2 to be used in partitions in which the thickness of the partition is greater than the standard height of the device 2 .
- the extension member 32 is also preferably sized so that standard size plastic pipe can fit over the top of the extension member 32 to provide further extension. That is, the outer diameter of the extension member 32 corresponds to the inner diameter of a standard size plastic pipe, whereby the plastic pipe is adapted to fit over the extension member 32 .
- the device includes an annular gasket 37 arranged in the recess 24 between the firestop material 26 and the shoulder portion 17 .
- the gasket 37 is formed of an elastomeric material and serves to form a smoke and water seal at ambient conditions with the pipe installed prior to expansion of the firestop material.
- the device 2 is also provided with an annular retaining ring 38 that attaches to the base portion 4 a of the device and retains the firestop material 26 in the device 2 .
- the retaining ring 38 includes tabs 39 to facilitate attachment of the retaining ring 38 to the base portion 4 a .
- the tabs 39 are aligned with and extend through slots 41 provided in the base portion 4 a .
- the retaining ring 38 may be provided with color coding to indicate the quantity of firestop material installed in the device and/or the type of pipe in the installation. This way, after the device has been installed in a partition, the quantity of firestop material and the type of installation (i.e. a plastic pipe or a metal pipe installation) can be quickly and easily identified by visual inspection, eliminating the need to remove the retaining ring to make such a determination.
- the device 2 may be provided with an adapter 40 that attaches to the base portion flange 15 and allows the device 2 to be used on contoured surfaces such as a fluted deck.
- the adapter 40 includes a hollow tubular extension portion 40 a , an outwardly extending flange portion 40 b , and snap connectors 42 that snap connect with the base portion 4 a of the device 2 .
- the device may be formed from a variety of materials, the device 2 is preferably formed of a synthetic plastic material such as polyethylene.
- the firestop material 26 may include an intumescent compound, an endothermic compound, or both an intumescent compound and an endothermic compound.
- Exemplary intumescent compounds include intumescent graphite such as intercalated graphite and acid treated graphite, hydrated alkali metal silicates, vermiculite, perlite, and NaBSi.
- Exemplary endothermic compounds include aluminum trihydrate (ATH), Al(OH) 3 hydrated zinc borate (ZnB 2 O 4 .6H 2 O), calcium sulfate (CaSO 4 .2H 2 O) also known as gypsum, magnesium ammonium phosphate (MgNH 4 PO 4 .6H 2 O), magnesium hydroxide (Mg(OH) 2 ), encapsulated H 2 O, and magnesium ammonium phosphate hexahydrate, MgO.2B 2 O 3 .9H 2 O.
- a preferred firestop material 26 is INTERAM Ultra GS Graphite mat available from 3M Company, St. Paul, Minn.
- the device 2 is shown installed in a concrete floor 44 .
- the device 2 is installed by first securing the device 2 to a wooden concrete form 46 with fasteners 48 , and then pouring concrete into the form 46 , thereby embedding the device in the concrete.
- the cap 28 is then removed and any unnecessary bands 18 a - d are removed by grasping and pulling the pull tabs 22 a - d . It will also be recognized that if the thickness of the partition is known, excess bands can be removed prior to installation.
- FIG. 7 there is shown a cast-in-place pass through firestop device 2 installed in a concrete floor 44 with the form 46 shown in FIG. 6 removed and a metal pipe 62 passing through the device 2 .
- the firestop device 2 in FIG. 7 is similar to the one shown in FIG. 6 except it further includes a flame retardant char forming insert 64 arranged between the intumescent firestop material 26 and the metal pipe 62 . It has been found that by providing a flame retardant char forming material between the intumescent material 26 and the pipe 62 , a fire barrier capable of passing the hose stream portion of the ASTM E814 test standard is created. Providing the char forming insert 64 is particularly useful when the device 2 is used to firestop a metal pipe passing through an opening in a floor.
- the insert 64 can be a continuous annular band that is secured within the device 2 using adhesive, mechanical fasteners, or the retaining ring 38 described above.
- the insert 64 can be a discontinuous arcuate band that can be compressed like a spring clip so that the insert can be positioned within the intumescent material 26 and held in place by the spring force.
- the insert 64 is formed of a flame retardant material (i.e. one that does not support combustion) that does not melt and which forms a char when exposed to high temperatures such as those encountered in a fire. In this manner, insert 64 works in combination with the expanded intumescent material 26 to provide a fire, smoke, and water barrier in the annular space around the metal pipe that enables the device to pass the hose stream portion of the ASTM E814 test standard.
- a flame retardant material i.e. one that does not support combustion
- Suitable flame retardant materials that form a char include halogenated polymers such as polychloroprene, polyvinyl chloride and polyvinylidene fluoride; chlorine flame retardant compounds such as perchloropentacyclodecane and chlorinated paraffins; bromine flame retardant compounds such as decabromodiphenyl oxide, octabromodiphenyl oxide, and tetrabromodipentaerythritol; phosphorous compounds such as ammonium polyphosphate and tributylphosphate; compounds including both chlorine and phosphorous such as 1,3dichloro-2-propanol phosphate and 2-chloroethanol phosphate; and nonhalogenated polymers such as hydrated zinc borate and boric oxide.
- a preferred flame retardant char forming material for the insert is polyvinyl chloride.
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Abstract
A cast-in-place pass through firestop device for providing a passage in a partition through which wires, cables, pipes, and the like are run includes a housing having a riser portion with frangible connections that define removable bands that can be readily removed by a user to adjust the height of the device in accordance with the thickness of the partition into which the device is installed. The removable bands include pull tabs that provide grasping means to facilitate removal of the bands by a user along a frangible connection. The housing also includes a base portion including a recess with ribs for maintaining firestop material in spaced relation from the base portion sidewall. A flame retardant char forming material, which works in combination with the firestop material to provide a fire, smoke, and water barrier, may also be provided adjacent the firestop material.
Description
- The present invention relates generally to firestop devices and, more particularly, to a cast-in-place firestop device for passing cables, pipes, and the like through a concrete partition, such as a floor.
- During the construction of buildings, it is necessary to provide openings or passages through the building floors, walls, and ceilings to permit the running of wires, cables, pipes, and the like. Such openings, however, which are often referred to as through-penetrations, provide one mechanism by which fire and smoke may spread from one compartment of the building to another.
- Through-penetrations in poured concrete partitions may be formed by various techniques including knocking holes in the partition after it has been formed, or using a device which is arranged on a concrete form before the concrete is poured. Such devices may include an intumescent firestop material which expands and closes the opening in the partition in the event of a fire, thereby preventing the spread of fire and smoke from one compartment of the building to another. Such devices are often referred to as cast-in-place pass through firestop devices.
- Cast-in-place firestop devices for providing a through-penetration in a partition that use intumescent material to close the passageway and prevent the spread of fire and smoke in the event of a fire are known in the patented art. The Harbeke U.S. Pat. No. 4,669,759, for example, discloses a firestop stack coupling including intumescent material which expands to close off a pipe passing through the coupling in the event of a fire. The Harbeke U.S. Pat. No. 4,888,925 discloses a fire retardant fluid coupling assembly having a metallic band wrapped about an intumescent collar.
- The Roth U.S. Pat. No. 5,347,767 discloses a smoke and fire protection device for providing a heat sealable raceway for running wires and cables through a concrete wall, ceiling, or floor. The device includes a thermally expansive material which, in the event of a fire, expands causing the raceway to collapse, thus preventing fire and/or smoke from passing through the wall, ceiling, or floor. The raceway slidably fits within a tubular housing allowing the raceway to extend through the sleeve to either side of the device, thereby allowing an installer to couple additional sections of the raceway at a convenient location remote from the device. The sleeve has a length sized to accommodate the thickness of the particular mounting location. Since the sleeve is sized to accommodate a particular partition thickness, the user must pre-select the appropriate size sleeve for a particular job, thereby requiring installers to keep a large number of different size devices on hand.
- The Rejecki U.S. Pat. No. 5,390,465 discloses a pass through firestop device for installation in a building wall or floor to provide a pass through opening for pipes, tubing, and the like. The device includes an axially open first end and a tubular body having a second end closed by a transverse wall. A ring of intumescent material fills the axially open first end. The device is installed during the formation of the building partitions by attaching the device to form elements and then pouring the floor or wall structure. After the floor is poured, the upper end section of the tubular body is removed by cutting it flush with the upper surface of the floor.
- The Münzenberger et al. U.S. Pat. No. 6,161,873 discloses a masonry lead-in fixture having a housing including an axially extending through bore, a radially protruding attachment flange provided at least at one end of the housing, an intumescent material which, in case of fire, closes the bore, and a disc-shaped partition located in the housing which extends over the inner diameter of the bore which is broken when pipe, cable, or the like is pushed through the fixture. The fixture includes a lengthening pipe formed of a plastic material that is cut-off to a desired length.
- Thus, there remains a need in the industry for a cast-in-place pass through device for providing a heat sealable passageway through partitions such as floors, walls, or ceilings in a structure such as a building for running cables, wires, pipes, and the like, that can be quickly and easily installed in partitions having varying thicknesses. In addition, there remains a need for such a device that allows for early, fast, uniform, and complete expansion of the intumescent material in case of a fire.
- It would therefore be desirable to provide a cast-in-place pass through firestop device for providing a heat sealable passageway in a partition that can be used in partitions of various thicknesses, and which further allows the intumescent material to quickly and completely expand when exposed to temperatures typically encountered during a fire.
- The present invention provides a firestop device for providing a passage through a partition in a structure comprising a housing and firestop material arranged within the housing, wherein the housing includes at least one frangible connection transecting the housing. The term firestop material refers generally to intumescent, endothermic, and ablative materials useful in resisting the spread of fire and smoke from one compartment of a structure to another.
- The frangible connection can be formed in the housing by providing a line of weakness in the housing by, for example, scoring, notching, or creasing the housing, or by molding or machining the housing to have a thin region in the wall, thereby allowing a user to easily tear the housing along the line of weakness. The frangible connection defines a removable band that can be readily removed by a user, typically with the aid of a hand tool such as pliers, to shorten the length of the housing to accommodate the thickness of the partition into which the device is installed. The removable band preferably includes a pull tab that provides grasping means for a user to remove the band from the housing along the frangible connection, thereby facilitating manual removal of the band.
- In a specific embodiment, the housing includes a base portion and a riser portion, the base portion including a recess adapted to receive the firestop material, and the riser portion including the frangible connection. The base portion includes a sidewall portion and a shoulder portion that combine to define the recess. The sidewall portion extends from a first open end toward the riser portion, and the shoulder portion extends inwardly from the sidewall portion to the riser portion.
- In one aspect of the invention, the sidewall and the shoulder portions include inner surfaces having ribs. The sidewall ribs serve to maintain the firestop material in the recess in spaced relation to the sidewall, thereby creating a gap between the firestop material and the sidewall that allows heated air from a fire to more completely surround the firestop material, thereby providing earlier, more uniform, and more complete expansion of the firestop material.
- In one embodiment, a gasket is provided between the firestop material and the shoulder portion to provide a seal that prevents water and smoke from passing through the opening prior to expansion of the firestop material. The shoulder portion rib helps retain the gasket in place.
- In another aspect of the invention, the housing has first and second opposed open ends and a hollow chamber having a longitudinal axis extending from the first open end to the second open end. The first open end is provided in the base portion and the second open end is provided in the riser portion. The firestop material is provided along the sidewall portion inner surface from the first open end to the shoulder portion.
- In a more specific aspect of the invention, the housing has a two-tiered cylindrical shape with the base portion having a larger diameter than the riser portion. The base portion may also include a radially outwardly extending flange extending outwardly from the periphery of the base portion adjacent the first open end for fixing the device to a form. In one embodiment, the flange extends outwardly 360 degrees around the base portion, and in another embodiment, two separate flanges extending radially outwardly from opposite sides of the base portion are provided to allow for closer stacking of adjacent devices.
- The riser portion preferably includes a plurality of equally sized transverse bands each including a manually engageable pull tab to facilitate manual removal of the associated bands with or without the aid of a manually operated hand tool. By removing successive bands, a user can adjust the length of the device (i.e. shorten) in accordance with the thickness of the partition into which the device is installed. It will be recognized that providing more bands will increase the range of partition thicknesses that can be accommodated by the device, and increasing the number of bands per unit length will increase the ability of the device to more closely match the thickness of the partition. In addition, the pull tabs on each band may be provided with indicia indicating the length of the device at the band and corresponding to the thickness of the partition. Each band may also include one or more radially outwardly extending circumferential ribs that provide the bands and, consequently, the riser with added hoop strength, and also provide a projection for making snap connections.
- In another aspect of the invention, the device includes a cap that is attached to the riser portion of the device to cover the second open end. In one embodiment, the cap includes cantilevers that snap onto the circumferential ribs, thereby securely attaching the cap to the riser portion. The firestop device may also include an extension member adapted to connect with the riser portion to increase the length of the device and allow the device to be used with partitions having thicknesses greater than the standard length of the device. The outer diameter of the extension is preferably sized so that standard size plastic pipe can fit over and connect with the extension to provide additional extension for the device.
- In another aspect of the invention, the device includes a retaining ring arranged within the base portion first open end adjacent the firestop material that serves to retain the firestop material in the base portion. The retaining ring may be coded with color or other indicia to indicate the quantity of firestop material provided in the device which, in turn, corresponds with the application of the device. An adapter may also be provided that connects with the base portion to allow the device to be coupled to a contoured surface such as a fluted or corrugated deck.
- In a specific embodiment, the present invention provides a firestop device for providing a passage through a partition in a structure comprising a housing having first and second opposed open ends and a hollow chamber having a longitudinal axis extending from the first open end to the second open end, the housing including a cylindrical base portion having a diameter and a cylindrical riser portion having a diameter smaller than the base diameter, the base portion including an annular sidewall portion extending from the first open end toward the riser portion and a shoulder portion extending radially inwardly from the sidewall portion to the riser portion, the sidewall portion and the shoulder portion defining an annular recess for receiving firestop material, the sidewall and the shoulder portions including inner surfaces having inwardly extending ribs, the riser portion including a plurality of longitudinally arranged frangibly connected circumferential bands having equal axial lengths, each band including a radially outwardly extending pull tab that can be used to remove an associated band from the riser portion along a frangible connection, thereby to reduce the height of the device in accordance with the thickness of the partition into which the device is installed.
- In another aspect of the invention, which is particularly useful for when a metal pipe is passed through the device, a flame retardant char forming material is provided within the housing adjacent the firestop material, preferably adjacent the inner surface of the firestop material. In a specific embodiment, the flame retardant char forming material is an annular band arranged concentrically within the firestop material. The flame retardant char forming material serves to strengthen the expanded intumescent material such that the resulting mass forms a fire barrier that can pass the hose stream portion of ASTM E 814 Fire Test Standard.
- The present invention will be further described with reference to the accompanying drawings, in which:
- FIG. 1 is a perspective view of a firestop device according to the invention;
- FIG. 2 is a bottom view of the housing;
- FIG. 3a is a sectional view taken along line 3 a-3 a in FIG. 2;
- FIG. 3b is a sectional view taken along
line 3 b-3 b in FIG. 2 showing the device with firestop material arranged therein; - FIG. 4 is a detailed sectional view taken along line4-4 of FIG. 1;
- FIG. 5 is an exploded perspective view of the device showing a cap, an extension member, and an adapter;
- FIG. 6 is a sectional view showing the device installed in a concrete floor; and
- FIG. 7 is a sectional view of an alternate embodiment of the invention showing a pipe passing through the device.
- Referring now to the drawings, wherein like reference numerals refer to like or corresponding parts throughout the several views, FIGS.1-6 show a cast-in-place pass through
firestop device 2 for providing a through-penetration in a floor, wall, ceiling, or the like. The term through-penetration generally refers to an opening in a floor, wall, ceiling, or the like, which allows cables, wires, pipes, or other items to pass from one compartment of a structure to another. To create a through-penetration using thedevice 2, the device is secured to a wooden concrete form 46 (FIG. 6) or other surface such as a fluted deck using an adapter 40 (FIG. 5), and concrete is poured into the form, thereby embedding thedevice 2 in the concrete 44. - The
device 2 includes a generally cylindricalhollow housing 4 having an openfirst end 6, an opensecond end 8, achamber 10 extending longitudinally from thefirst end 6 to the secondopen end 8, and intumescent firestop material 26 (FIGS. 3b, 6 and 7) arranged in thedevice 2 adjacent the firstopen end 6. It will be recognized that thehousing 4 may have a shape other than cylindrical. For example, thehousing 4 may have a square or rectangular cross section. - The
housing 4 includes abase portion 4 a having a longitudinally extendingannular side wall 14 extending from the openfirst end 6 toward the opensecond end 8, radially outwardly extendingflange portions 15 extending outwardly in opposite directions from thebase portion 4 a adjacent the opensecond end 8, a radially inwardly extendingshoulder portion 17 extending inwardly from thesidewall 14, and ariser portion 4 b having a longitudinally extendingannular side wall 16 extending from theshoulder portion 17 to the secondopen end 8. Thebase portion 4 a has a larger diameter than theriser portion 4 b giving thehousing 4 a two-tiered tapered configuration in which thebase portion 4 a has a greater cross-sectional area than theriser portion 4 b. - In accordance with a characterizing feature of the invention, the
riser portion 4 b includes a plurality of circumferential bands 18 a-d connected by frangible connections 20 a-d. The frangible connections 20 a-d allow one or more bands 18 a-d of theriser 4 b to be quickly, easily, accurately, and cleanly removed by a user, typically with the aid of a manually operated hand tool such as pliers, at pre-selected intervals so thedevice 2 can be used in partitions having a variety of thicknesses. - Each band18 forms a continuous 360 degree loop which forms a section of the
riser portion 4 b that can be readily removed by a user to shorten theriser portion 4 b and thereby match the thickness of the partition into which the device is installed. Each band 18 includes a pair ofcircumferential ribs 18 a′ (FIG. 4) that provide hoop strength and provide means for forming a snap connection with theriser portion 4 b. The frangible connections 20 a-d are lines of weakness formed by, for example, molding or machining the riser to have thin areas of material connecting adjacent bands 18 a-d that can be manually broken by a user to separate adjacent bands. - Each band18 a-d includes a pull tab 22 a-d extending radially outwardly from the bands 18 a-d. The pull tabs 22 a-d facilitate removal of the associated bands 18 a-d by providing grasping means for a user to grasp and pull, typically with the aid of a hand tool such as pliers, thereby tearing the associated frangible connection to remove the band from the
riser 4 b. Each pull tab 22 a-d may be marked with indicia indicating the length or height of the device at that pull tab corresponding to the thickness of the partition. - The
base portion 4 a contains anannular recess 24 for receiving firestop material 26 (FIGS. 3b, 5, 6 and 7). Thefirestop material 26 is provided in the form of an annular ring as shown in FIG. 5 that extends along the inner surface of thesidewall portion 14 from the firstopen end 6 to theshoulder portion 17. Thefirestop material 26 may be held in place in therecess 24 with adhesive, using mechanical fasteners, or by using a retaining ring 38 (FIG. 5) described more fully below. To facilitate the installation of a pipe through thedevice 2, the inner surface of thefirestop material 26 if preferably aligned with the inner surface of theriser portion 4 b, that is, the inner diameter of thefirestop material 26 and theriser 4 b are the same, whereby the diameter of thechamber 10 is generally the same along the entire length of thedevice 2. - The
recess 24 is defined by thesidewall portion 14 and theshoulder portion 17 of thebase portion 4 a. In accordance with another characterizing feature of the invention, the inner surfaces of thesidewall portion 14 and theshoulder portion 17 facing thechamber 10 includerib portions sidewall ribs 14 a extend radially inwardly from thesidewall 14 and extend longitudinally from adjacent theflange 15 to theshoulder portion 17. Theshoulder portion rib 17 a is an annular projection extending outwardly from theshoulder portion 17 in the direction of thefirst opening 6. The sidewall portion ribs 14 a maintain thefirestop material 26 in spaced relation from thesidewall portion 14 and create anair gap 27 between thefirestop material 26 and theside wall portion 14 which, in the event of a fire, allows the entire axial length of the firestop material to be exposed to heated air, thereby aiding rapid, complete, and uniform expansion of the firestop material which in turn closes the through-penetration. - Referring now to FIG. 5, the
device 2 is provided with acap 28 that attaches to theriser portion 4 b and covers the secondopen end 8. Thecap 28 prevents concrete being poured during the formation of a partition from entering thedevice 2. Thecap 28 includessnap connectors 30 that allow the cap to be manually snap fit onto theriser portion 4 b via thecircumferential ribs 18 a′. - The
device 2 may also be provided with anextension member 32 that attaches to the top of theriser portion 4 b adjacent the opensecond end 8. Theextension member 32 contains cut-outs 34 aligned with tabs 22 a-d on theriser portion 4 b that allow theextension member 32 to be placed in overlapping relation with theriser portion 4 b. Theextension member 32 also includessnap connections 36 that allow the extension to be attached to theriser portion 4 b. Theextension member 32 serves to increase the height of thedevice 2 and thereby allows thedevice 2 to be used in partitions in which the thickness of the partition is greater than the standard height of thedevice 2. Theextension member 32 is also preferably sized so that standard size plastic pipe can fit over the top of theextension member 32 to provide further extension. That is, the outer diameter of theextension member 32 corresponds to the inner diameter of a standard size plastic pipe, whereby the plastic pipe is adapted to fit over theextension member 32. - The device includes an
annular gasket 37 arranged in therecess 24 between thefirestop material 26 and theshoulder portion 17. Thegasket 37 is formed of an elastomeric material and serves to form a smoke and water seal at ambient conditions with the pipe installed prior to expansion of the firestop material. Thedevice 2 is also provided with anannular retaining ring 38 that attaches to thebase portion 4 a of the device and retains thefirestop material 26 in thedevice 2. The retainingring 38 includestabs 39 to facilitate attachment of the retainingring 38 to thebase portion 4 a. Thetabs 39 are aligned with and extend throughslots 41 provided in thebase portion 4 a. Once the retainingring 38 is installed in thedevice 2, thetabs 39 are bent outwardly to secure the retainingring 38 in place and also anchor thedevice 2 in the concrete after the concrete is poured. - Since the quantity of
firestop material 26 provided in thedevice 2 will vary depending on the type of installation (for example, more firestop material will be provided in the device when it is used with a plastic pipe than a metal pipe), the retainingring 38 may be provided with color coding to indicate the quantity of firestop material installed in the device and/or the type of pipe in the installation. This way, after the device has been installed in a partition, the quantity of firestop material and the type of installation (i.e. a plastic pipe or a metal pipe installation) can be quickly and easily identified by visual inspection, eliminating the need to remove the retaining ring to make such a determination. - In addition, the
device 2 may be provided with anadapter 40 that attaches to thebase portion flange 15 and allows thedevice 2 to be used on contoured surfaces such as a fluted deck. Theadapter 40 includes a hollowtubular extension portion 40 a, an outwardly extendingflange portion 40 b, and snapconnectors 42 that snap connect with thebase portion 4 a of thedevice 2. - While the device may be formed from a variety of materials, the
device 2 is preferably formed of a synthetic plastic material such as polyethylene. Thefirestop material 26 may include an intumescent compound, an endothermic compound, or both an intumescent compound and an endothermic compound. Exemplary intumescent compounds include intumescent graphite such as intercalated graphite and acid treated graphite, hydrated alkali metal silicates, vermiculite, perlite, and NaBSi. Exemplary endothermic compounds include aluminum trihydrate (ATH), Al(OH)3 hydrated zinc borate (ZnB2O4.6H2O), calcium sulfate (CaSO4.2H2O) also known as gypsum, magnesium ammonium phosphate (MgNH4PO4.6H2O), magnesium hydroxide (Mg(OH)2), encapsulated H2O, and magnesium ammonium phosphate hexahydrate, MgO.2B2O3.9H2O. Apreferred firestop material 26 is INTERAM Ultra GS Graphite mat available from 3M Company, St. Paul, Minn. - Referring to FIG. 6, the
device 2 is shown installed in aconcrete floor 44. Thedevice 2 is installed by first securing thedevice 2 to a woodenconcrete form 46 withfasteners 48, and then pouring concrete into theform 46, thereby embedding the device in the concrete. Thecap 28 is then removed and any unnecessary bands 18 a-d are removed by grasping and pulling the pull tabs 22 a-d. It will also be recognized that if the thickness of the partition is known, excess bands can be removed prior to installation. - Referring to FIG. 7, there is shown a cast-in-place pass through
firestop device 2 installed in aconcrete floor 44 with theform 46 shown in FIG. 6 removed and a metal pipe 62 passing through thedevice 2. Thefirestop device 2 in FIG. 7 is similar to the one shown in FIG. 6 except it further includes a flame retardantchar forming insert 64 arranged between theintumescent firestop material 26 and the metal pipe 62. It has been found that by providing a flame retardant char forming material between theintumescent material 26 and the pipe 62, a fire barrier capable of passing the hose stream portion of the ASTM E814 test standard is created. Providing thechar forming insert 64 is particularly useful when thedevice 2 is used to firestop a metal pipe passing through an opening in a floor. - The
insert 64 can be a continuous annular band that is secured within thedevice 2 using adhesive, mechanical fasteners, or the retainingring 38 described above. Alternatively, theinsert 64 can be a discontinuous arcuate band that can be compressed like a spring clip so that the insert can be positioned within theintumescent material 26 and held in place by the spring force. - The
insert 64 is formed of a flame retardant material (i.e. one that does not support combustion) that does not melt and which forms a char when exposed to high temperatures such as those encountered in a fire. In this manner, insert 64 works in combination with the expandedintumescent material 26 to provide a fire, smoke, and water barrier in the annular space around the metal pipe that enables the device to pass the hose stream portion of the ASTM E814 test standard. - The particular material selected for the
insert 64 is not critical to the invention hereof, so long as it provides the desired function. Suitable flame retardant materials that form a char include halogenated polymers such as polychloroprene, polyvinyl chloride and polyvinylidene fluoride; chlorine flame retardant compounds such as perchloropentacyclodecane and chlorinated paraffins; bromine flame retardant compounds such as decabromodiphenyl oxide, octabromodiphenyl oxide, and tetrabromodipentaerythritol; phosphorous compounds such as ammonium polyphosphate and tributylphosphate; compounds including both chlorine and phosphorous such as 1,3dichloro-2-propanol phosphate and 2-chloroethanol phosphate; and nonhalogenated polymers such as hydrated zinc borate and boric oxide. A preferred flame retardant char forming material for the insert is polyvinyl chloride. - The patents, patent documents, and patent applications cited herein are incorporated by reference in their entirety as if each were individually incorporated by reference. It will be apparent to those of ordinary skill in the art that various changes and modifications may be made without deviating from the inventive concept set forth above. For example, it will be recognized that the device may also include stabilizers to prevent rotational or axial movement of the device after the device has been installed in a floor, ceiling, wall, or the like. Thus, the scope of the present invention should not be limited to the structures described in this application, but only by the structures described by the language of the claims and the equivalents of those structures.
Claims (23)
1. A firestop device for providing a passage through a partition in a structure, comprising:
(a) a housing; and
(b) firestop material arranged within said housing;
said housing including at least one frangible connection transecting said housing defining a removable band.
2. A firestop device as defined in claim 1 , wherein said band includes a pull tab, said pull tab providing grasping means for allowing a user to remove said band from said housing at said frangible connection.
3. A firestop device as defined in claim 1 , wherein said housing comprises a base portion and a riser portion, said base portion including a recess for receiving said firestop material, and said riser portion including said frangible connection.
4. A firestop device as defined in claim 3 , wherein said base portion includes a sidewall portion extending from a first open end toward said riser portion, and a shoulder portion extending inwardly from said sidewall portion to said riser portion, said sidewall portion and said shoulder portion defining said recess for receiving said firestop material.
5. A firestop device as defined in claim 4 , wherein said sidewall and said shoulder portions include inner surfaces having ribs.
6. A firestop device as defined in claim 5 , wherein said housing has first and second opposed open ends and a hollow chamber having a longitudinal axis extending from said first open end to said second open end.
7. A firestop device as defined in claim 6 , wherein said first open end is provided in said base portion and said second open end is provided in said riser portion, said firestop material being provided in spaced relation along said sidewall portion inner surface from said first open end to said shoulder portion.
8. A firestop device as defined in claim 7 , wherein said housing has a two-tiered cylindrical shape, said base portion having a larger diameter than said riser portion.
9. A firestop device as defined in claim 8 , wherein said base portion further includes a flange adjacent said first open end for fixing said device to a form.
10. A firestop device as defined in claim 9 , wherein said riser portion includes a plurality of equally segmented transverse bands each including a manually engageable pull tab.
11. A firestop device as defined in claim 10 , wherein each said pull tab includes indicia indicating the length of the device at each band corresponding to the thickness of the partition.
12. A firestop device as defined in claim 11 , further comprising a cap attached to said riser portion thereby to cover said second open end.
13. A firestop device as defined in claim 12 , wherein said cap contains snap connectors that snap onto said riser portion, thereby to attach said cap to said riser portion.
14. A firestop device as defined in claim 11 , further comprising an extension member adapted to connect with said riser portion adjacent said open second end.
15. A firestop device as defined in claim 3 , further comprising a retaining ring arranged within said base portion first open end adjacent said firestop material.
16. A firestop device as defined in claim 15 , wherein said retaining ring is coded to indicate the quantity of firestop material provided in the device depending on the application of the device.
17. A firestop device as defined in claim 11 , further comprising an adapter connected with said base portion for coupling said device to a contoured surface.
18. A firestop device for providing a passage through a partition in a structure comprising a housing having first and second opposed open ends and a hollow chamber having a longitudinal axis extending from said first open end to said second open end, said housing including a cylindrical base portion having a diameter and a cylindrical riser portion having a diameter smaller than said base diameter, said base portion including an annular sidewall portion extending from said first open end toward said riser portion and a shoulder portion extending radially inwardly from said sidewall portion to said riser portion, said sidewall portion and said shoulder portion defining an annular recess for receiving firestop material, said sidewall and said shoulder portions including inner surfaces having inwardly extending ribs, said riser portion including a plurality of longitudinally arranged frangibly connected circumferential bands having equal axial lengths, each band including a radially outwardly extending pull tab that can be used to manually remove a band from said riser portion along a frangible connection, thereby to reduce the height of the device in accordance with the thickness of the partition into which the device is installed.
20. A firestop device for providing a passage for pipe, cables, or the like through a partition in a structure, comprising:
(a) a housing;
(b) firestop material arranged within said housing; and
(c) a flame retardant char forming material arranged within said housing adjacent said firestop material.
21. A firestop device as defined in claim 20 , wherein said flame retardant char forming material is arranged within said firestop material.
22. A firestop device as defined in claim 21 , wherein said flame retardant char forming material is an annular band arranged concentrically within said firestop material.
23. A firestop device as defined in claim 20 , wherien said flame retardant char forming material is polyvinyl chloride.
24. A firestop device for providing a passage for pipe, cables, or the like through a partition in a structure, comprising:
(a) a cylindrical housing including a base portion having an annular recess and a riser portion including a plurality of frangibly connected circumferential bands each including a pull tab that can be used to manually remove a band from said riser portion along a frangible connection;
(b) firestop material arranged within said base portion annular recess; and
(c) a flame retardant char forming material arranged within said base portion annular recess within said firestop material.
Priority Applications (15)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/122,859 US6694684B2 (en) | 2002-04-15 | 2002-04-15 | Pass through firestop device |
DE60220165T DE60220165T2 (en) | 2001-07-12 | 2002-06-21 | FIRE PROTECTION DEVICE |
PCT/US2002/019931 WO2003006865A1 (en) | 2001-07-12 | 2002-06-21 | Pass-through firestop device |
JP2003512592A JP2004534600A (en) | 2001-07-12 | 2002-06-21 | Penetration fire protection device |
AT02744570T ATE362595T1 (en) | 2001-07-12 | 2002-06-21 | FIRE PROTECTION DEVICE |
EP02744570A EP1404999B1 (en) | 2001-07-12 | 2002-06-21 | Pass-through firestop device |
ES02744570T ES2287291T3 (en) | 2001-07-12 | 2002-06-21 | FIREWORKING DEVICE WITH STEP THROUGH. |
KR10-2004-7016386A KR20040101470A (en) | 2002-04-15 | 2003-02-21 | Pass-through firestop device |
EP03711219A EP1495248B1 (en) | 2002-04-15 | 2003-02-21 | Pass-through firestop device |
PCT/US2003/005498 WO2003089828A1 (en) | 2002-04-15 | 2003-02-21 | Pass-through firestop device |
JP2003586523A JP2005522303A (en) | 2002-04-15 | 2003-02-21 | Through fire prevention device |
CA002482472A CA2482472A1 (en) | 2002-04-15 | 2003-02-21 | Pass-through firestop device |
AU2003215394A AU2003215394B2 (en) | 2002-04-15 | 2003-02-21 | Pass-through firestop device |
AT03711219T ATE334334T1 (en) | 2002-04-15 | 2003-02-21 | FIRE PROTECTION DEVICE |
DE60307078T DE60307078T2 (en) | 2002-04-15 | 2003-02-21 | FIRE PROTECTION DEVICE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US10/122,859 US6694684B2 (en) | 2002-04-15 | 2002-04-15 | Pass through firestop device |
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US20030192269A1 true US20030192269A1 (en) | 2003-10-16 |
US6694684B2 US6694684B2 (en) | 2004-02-24 |
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US (1) | US6694684B2 (en) |
EP (1) | EP1495248B1 (en) |
JP (1) | JP2005522303A (en) |
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AT (1) | ATE334334T1 (en) |
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CA (1) | CA2482472A1 (en) |
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Also Published As
Publication number | Publication date |
---|---|
ATE334334T1 (en) | 2006-08-15 |
AU2003215394B2 (en) | 2008-04-17 |
WO2003089828A1 (en) | 2003-10-30 |
DE60307078D1 (en) | 2006-09-07 |
KR20040101470A (en) | 2004-12-02 |
AU2003215394A1 (en) | 2003-11-03 |
JP2005522303A (en) | 2005-07-28 |
CA2482472A1 (en) | 2003-10-30 |
DE60307078T2 (en) | 2007-02-15 |
EP1495248B1 (en) | 2006-07-26 |
EP1495248A1 (en) | 2005-01-12 |
US6694684B2 (en) | 2004-02-24 |
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